Nature Or Supernatural: The Moving Rocks

It all happened at the Dead Valley in California. We almost didn't see anything else in the area but a few rocks which is out of place.

The mystery part is that the rocks in this area can move by itself, leaving a long winding trail behind as if they are alive.

If nobody lives there, even if there are, who would do such a thing as to move the rocks around leaving a suspicious trail?

Some said it's due to the abrupt temperature change at night where the land frost over. In the morning when temperature rises, the land expands thus pushing the rocks a little.

Over the years of frequent expansions and contractions, the rocks were pushed around far enough to leave a long winding trail as if some supernatural forces had done so. Especially at a place called the Dead Valley.